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1 wire alternator wiring diagram

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md20201
Posts: 9
Joined: Wed Dec 30, 2020 9:50 am
Zip Code: 27009

Re: 1 wire alternator wiring diagram

Postby md20201 » Wed May 12, 2021 11:46 am

the alternator is a SBC8162 121805E Chevy Danso. I did try exciting it by jumping from the post over to the tabs no charging. I am adding that resistor now as mentioned. Thanks

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md20201
Posts: 9
Joined: Wed Dec 30, 2020 9:50 am
Zip Code: 27009

Re: 1 wire alternator wiring diagram

Postby md20201 » Wed May 12, 2021 11:51 am

should I put resistors on both wires going to the coil and the alternator?

Gary Dotson
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Re: 1 wire alternator wiring diagram

Postby Gary Dotson » Thu May 13, 2021 8:08 am

No, only from the Bat. side of the coil to the vertical pin on your Mini Denso. Are you using a resister rather than a diode? That's fine but you need to select a resister with the appropriate value. You need enough current flow to excite the alternator but not enough to back feed the coil and prevent engine shut down. Measure the value through a dash light bulb and mimic that.
Dale, we might be able to come up with something.

md20201
Posts: 9
Joined: Wed Dec 30, 2020 9:50 am
Zip Code: 27009

Re: 1 wire alternator wiring diagram

Postby md20201 » Sun May 16, 2021 1:28 pm

OK I messed up I put the resistor in the coil line not he alternator by mistake. Tractor shut down. I have no fire. I have taken out the resistor, added new coil,condenser and points. I still have no fire. I just replaced all the wires plugs etch it was running good, Sorry to be a bother I'm lost. Mark..

md20201
Posts: 9
Joined: Wed Dec 30, 2020 9:50 am
Zip Code: 27009

Re: 1 wire alternator wiring diagram

Postby md20201 » Tue May 25, 2021 11:31 am

Still no luck added diode no charge.

liebervj
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Re: 1 wire alternator wiring diagram

Postby liebervj » Fri Dec 10, 2021 6:21 pm

Also having difficulties with my 12 volt conversion on my Cub. Installed a Chevy Mini Alternator 1 Wire 4 12180 SE. Wired alternator to battery via starter switch. Alternator is not charging. Do I need to excite it? Beside the battery terminal there also two spade terminals on the back of the alternartor. These are not labeled. There is a vertical one closest to the battery terminal and a horizional one to the left of the vertical one. Which terminals do I connect to excite alternator? Can I just flash it or do I need to install permanent wire with a diodoe? Thanks in advance for your assistance.

Jim Becker
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Re: 1 wire alternator wiring diagram

Postby Jim Becker » Fri Dec 10, 2021 8:23 pm

This is a new question added to a fairly old thread. It should be, and already is, in a new thread. I am locking this one so any replies will need to be made in the other thread.


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